---
product_id: 382594009
title: "Antifreeze Refractometer 4-in-1 DEF Antifreeze Coolant Refractometer | Antifreeze Tester for Checking Antifreeze Coolant System, Diesel Exhaust Fluid, Battery Acid and Windshield Washer Fluid"
brand: "hallocool"
price: "$40.63"
currency: USD
in_stock: true
category: "Hallocool"
url: https://www.desertcart.us/products/382594009-antifreeze-refractometer-4-in-1-def-antifreeze-coolant-refractometer-antifreeze
store_origin: US
region: United States of America
---

# Battery acid specific gravity 1.10-1.40 Kg/L Automatic Temperature Compensation (ATC) 4-in-1 freezing point & fluid tester Antifreeze Refractometer 4-in-1 DEF Antifreeze Coolant Refractometer | Antifreeze Tester for Checking Antifreeze Coolant System, Diesel Exhaust Fluid, Battery Acid and Windshield Washer Fluid

**Brand:** hallocool
**Price:** $40.63
**Availability:** ✅ In Stock

## Summary

> ❄️ Stay Cool, Stay Ahead: The Ultimate 4-in-1 Fluid Tester for the Modern Manager

## Quick Answers

- **What is this?** Antifreeze Refractometer 4-in-1 DEF Antifreeze Coolant Refractometer | Antifreeze Tester for Checking Antifreeze Coolant System, Diesel Exhaust Fluid, Battery Acid and Windshield Washer Fluid by hallocool
- **How much does it cost?** $40.63 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/382594009-antifreeze-refractometer-4-in-1-def-antifreeze-coolant-refractometer-antifreeze)

## Best For

- hallocool enthusiasts

## Why This Product

- Trusted hallocool brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Rugged & Ready:** Durable aluminum & ABS rubber build with portable case for on-the-go pros
- • **All-in-One Precision:** Test antifreeze, DEF, battery acid & windshield fluid with one sleek device
- • **Smart ATC Technology:** Auto temperature compensation ensures spot-on readings every time
- • **Battery-Free Operation:** Optical design means zero batteries, zero downtime—always ready when you are
- • **Minimal Sample, Maximum Accuracy:** Just 2-3 drops needed for fast, reliable results—no bulky hydrometers required

## Overview

The Hallocool Antifreeze Refractometer is a compact, durable 4-in-1 optical tester designed for professionals to accurately measure freezing points of antifreeze, urea concentration in diesel exhaust fluid, battery acid specific gravity, and windshield washer fluid levels. Featuring automatic temperature compensation and requiring only a few drops of fluid, it delivers precise readings without batteries, making it an essential, portable tool for vehicle maintenance and fluid monitoring.

## Description

Antifreeze Refractometer 4-in-1 DEF Antifreeze Coolant Refractometer | Antifreeze Tester for Checking Antifreeze Coolant System, Diesel Exhaust Fluid, Battery Acid and Windshield Washer Fluid: desertcart.com: Industrial & Scientific

## Features

- 4 IN 1 FUNCTION: Antifreeze refractometers measure freezing point of automobile antifreeze based on ethylene glycol or propylene glycol, and measuring range: -50 to 0 degrees Celsius. Measure Urea Concentration in automobile diesel exhaust fluid (DEF) 30% to 35%. Measure specific gravity of battery acid 1.10 to 1.40Kg/L. Windshield washer fluid based on ethanol or isopropyl alcohol -40 to 0 degrees Celsius
- Better Accuracy and Reliable: ATC antifreeze coolant testers can compensate temperature automatically when ambient temp changes, excellent eliminate the deviation, and ensure the measured readings more precise
- Quick and Easy Using: Just 2 or 3 drops of solution, wait for few seconds and towards light, then get the accurate reading. The affordable coolant refractometer needs less sample solution than traditional hydrometer and less expensive then digital refractometer but better accuracy
- Durable and Portable: Antifreeze tester is made of non-staining aluminum and ABS rubber, anti-rust, sturdy and resistant to abrasion for long performance. Comes with durable plastic box, lightweight, and easy for storage and carry with
- Practical Tool: The optics antifreeze refractometer is a tool to help you check freezing point of automobile antifreeze system, quick reference of battery charge condition, monitor DEF and windshield water fluid status
- Adjustable Eyepiece Design: Refractometer coolant tester features smooth eyepieces that are easy to adjust and provide clearly visible scale readings for enhanced user experience
- No Battery Required: Optical coolant refractometer for automobile, no need batteries, ensuring convenient operation at all times

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09FYV9D72 |
| Best Sellers Rank | #305,453 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #144 in Lab Refractometers |
| Date First Available | September 11, 2021 |
| Item Weight | 9.9 ounces |
| Manufacturer | Hallocool |
| Product Dimensions | 6.1 x 1.57 x 1.57 inches |

## Images

![Antifreeze Refractometer 4-in-1 DEF Antifreeze Coolant Refractometer | Antifreeze Tester for Checking Antifreeze Coolant System, Diesel Exhaust Fluid, Battery Acid and Windshield Washer Fluid - Image 1](https://m.media-amazon.com/images/I/61KtCQLgOjL.jpg)

## Available Options

This product comes in different **Color** options.

## Frequently Bought Together

- Antifreeze Refractometer 4-in-1 Coolant Refractometer Antifreeze Tester for Automobile Antifreeze System Diesel Exhaust Fluid, Battery Acid and Windshield Washer Fluid
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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-08-20*